Are these two the last Left 4 Dead II campaigns?

We've had three of the five campaigns revealed for Left 4 Dead II but could these two be the last ones? A Taiwanese website has pictures for Dead Center and Hard Rain as the names of the last two campaigns for the game.

For those keeping score, this would join Dark Carnival, Swamp Fever, and The Parish as the five available campaigns to play through. Dark Center looks like a Dawn of the Dead reference as the setting would be in a mall while Hard Rain would take place.. well in a rain and flooded setting.

The game will be out in a month but the demo is coming in the new few weeks.